Use in cosmetics or in topical application of an aqueous dispersion based on organopolysiloxanes and on a cross-linked acrylamide/neutralized 2-acrylamido-2-methylpropanesulfonic acid copolymer

ABSTRACT

The present invention relates to the use in cosmetics or in topical application of an aqueous dispersion containing, in a cosmetically acceptable aqueous medium, at least one organopolysiloxane and one crosslinked acrylamide/neutralized 2-acrylamido-2-methylpropanesulfonic acid copolymer, with the proviso that the organopolysiloxane is not a linear dimethylpolysiloxane with a viscosity of less than 10 -1  m 2  /s.

The invention relates to the use in cosmetics or in topical applicationof an aqueous dispersion based on organopolysiloxanes and on acrosslinked acrylamide/neutralized 2-acrylamido-2-methylpropanesulfonicacid copolymer.

Silicone oils are already used in cosmetics as lubricating agents inhair and skin treatment compositions. They are mainlypolydimethylsiloxanes.

In order to introduce softness to the hair or the skin, or also tofacilitate disentangling of hair, cationic polymers or surface-activeagents have been used for a long time. Cationic compounds have thedisadvantage, after repeated applications, of making the hair lank bygiving it a greasy appearance or of producing a sticky effect on theskin.

The Applicant has discovered, surprisingly, that the use of an aqueousdispersion based on organopolysiloxanes and on a crosslinkedacrylamide/neutralized 2-acrylamido-2-methylpropanesulphonic acidcopolymer for hair treatment makes it possible to obtain shiny, silkyand lively hair whose disentangling and softness properties aresubstantially improved.

The use of this aqueous dispersion in skin treatment also makes itpossible to confer on the skin a soft feel without a sticky effect.

The aqueous dispersions used in cosmetics or in topical application,according to the present invention, spread much more easily on the skinand the hair than the compositions of the prior art based on cationiccompounds.

The Applicant has also discovered that the cosmetic compositions in theform of an aqueous dispersion, according to the present invention, wereremarkably stable and that their cosmetic qualities were retained evenafter several successive applications and more particularly innon-rinsed application on hair.

The subject of the invention thus consists of the use in cosmetic hairor skin treatment or in topical application of an aqueous dispersioncontaining at least one organopolysiloxane and of one crosslinkedacrylamide/neutralized 2-acrylamido-2-methylpropane-sulfonic acidcopolymer.

Another subject of the invention relates to cosmetic or dermatologicalcompositions for hair or skin treatment in the form of aqueousdispersions.

Another subject of the invention relates to processes for cosmetic hairor skin treatment using these compositions, depending upon the desiredapplication.

Other subjects of the invention will become apparent in the light of thedescription and the examples which follow.

The main subject of the present invention is the use, for cosmetic hairor skin treatment, or in topical application, of an aqueous dispersion,characterized in that the latter contains, in a cosmetically orphysiologically acceptable aqueous medium, at least oneorganopolysiloxane and one crosslinked acrylamide/neutralized2-acrylamido-2-methylpropanesulfonic acid copolymer, with the provisothat the organopolysiloxane is not chosen from linearpolydimethylsiloxanes with a viscosity of less than 10⁻¹ m² /s.

The organopolysiloxanes used in the dispersions according to the presentinvention are organopolysiloxane oils or organic solutions containingorganosiloxane gum or resin.

Among the organosiloxanes used in accordance with the present invention,there may be mentioned, in a nonlimiting way:

I. Volatile silicones

These have a boiling point between 60° C. and 260° C. Among this type ofsilicone, there are mentioned:

(i) cyclic silicones containing 3 to 7 silicon atoms and preferably 4 to5. They are, for example, octamethylcyclotetrasiloxane sold under thename of Volatile Silicone 7207 by Union Carbide or Silbione 70045 V2 byRhone-Poulenc or decamethylcyclopentasiloxane sold under the name ofVolatile Silicone 7158 by Union Carbide, or Silbione 70045 V5 byRhone-Poulenc, as well as their mixtures.

There are also mentioned cyclocopolymers ofdimethylsiloxane/methylalkylsiloxane type, such as Silicone Volatile FZ3109 sold by the Company Union Carbide, which is adimethylsiloxane/methyloctylsiloxane cyclocopolymer;

(ii) linear volatile silicones having 2 to 9 silicon atoms and having aviscosity less than or equal to 5.10⁻⁶ m² /s at 25° C. They are, forexample, hexamethyldisiloxane sold under the name Silbione 70 041 V 0.65by the Company Rhone-Poulenc. This type of product is described in thearticle by Todd & Byers, "Volatile silicone fluids for cosmetics",Cosmetics and Toiletries, Vol. 91, Jan 76, p. 27-32.

II. Nonvolatile silicones

They consist mainly of polyalkylsiloxanes, polyarylsiloxanes,polyalkylarylsiloxanes, silicone gums and resins and organomodifiedpolysiloxanes, as well as their mixtures.

Among polyalkylsiloxanes, there may mainly be mentioned linearpolydimethylsiloxanes with a viscosity greater than 10⁻¹ m² /s:

either,

containing trimethylsilyl end groups, such as, for example and in anon-limiting way, Silbione oils of the 70047 series marketed byRhone-Poulenc, 47 V 500.000 oil of Rhone-Poulenc or certain Viscasils ofGeneral Electric,

or

containing trihydroxysilyl end groups, such as oils of the 48 V seriesof Rhone-Poulenc.

In this polyalkylsiloxane class, there may also be mentionedpolyalkylsiloxanes sold by the Company Goldschmidt under the namesAbilwax 9800 and Abilwax 9801, which are poly(C₁ -C₂₀)alkylsiloxanes.

Among polyalkylarylsiloxanes, there may be mentioned linear and/orbranched polydimethyldiphenylsiloxanes or polydimethylphenylsiloxanes,with a viscosity 10⁻⁵ to 5.10⁻² m² /s at 25° C., such as, for example:

Rhodorsil 763 oil of Rhone-Poulenc,

Silbione oils of the 70641 series of Rhone-Poulenc, such as Silbione70641 V 30 and 70641 V 200 oils of Rhone-Poulenc,

the product DC 556 Cosmetic Grad Fluid of Dow Corning,

silicones of the PK series of Bayer, such as PK20,

silicones of the PN or PH series of Bayer, such as PN 1000 and PH 1000,

certain oils of the SF series of General Electric, such as SF 1250, SF1265, SF 1154 or SF 1023.

Silicone gums, in accordance with the present invention,are-polydiorganosiloxanes with a high molecular mass of between 200,000and 1,000,000, used alone or as a mixture in a solvent chosen fromvolatile silicones, polydimethylsiloxane oils (PDMS),polyphenylmethylsiloxane oils (PPMS), isoparaffins, methylene chloride,pentane, dodecane, tridecane, tetradecane or their mixtures.

There are mentioned, for example, the following compounds:

poly[dimethylsiloxane/methylvinylsiloxane ],

poly[dimethylsiloxane/diphenylsiloxane ],

poly[dimethylsiloxane/phenylmethylsiloxane ],

poly[dimethylsiloxane/diphenylsiloxane/methylvinylsiloxane].

There may be mentioned, for example, in a non-limiting way, thefollowing mixtures:

1) mixtures formed from a polydimethylsiloxane hydroxylated at the chainends (Dimethiconol according to the CTFA nomenclature), and from acyclic polydimethylsiloxane (Cyclomethicone according to the CTFAnomenclature), such as the product Q2 1401 sold by the Company DowCorning;

2) mixtures formed from a polydimethylsiloxane gum with a cyclicsilicone, such as the product SF 1214 Silicone Fluid of GeneralElectric, which is an SE 30 gum with an MW of 500,000 solubilized in SF1202 Silicone Fluid (decamethylcyclopentasiloxane);

3) mixtures of two PDMSs having different viscosities, especially of aPDMS gum and of a PDMS oil, such as the products SF 1236 and CF 1241 ofthe Company General Electric. The product SF 1236 is the mixture of anSE 30 gum defined above having a viscosity of 20 m² /s and of an oil SF96 having a viscosity of 5.10⁻⁶ m² /s (15% of SE 30 gum and 85% of SF 96oil).

The product CF 1241 is the mixture of an SE 30 gum (33%) and of a PDMS(67%) having a viscosity 10⁻³ m² /s.

Organopolysiloxane resins which can be used in accordance with theinvention are crosslinked siloxane systems containing the units: R₂SiO_(2/2), RSiO_(3/2) and SiO_(4/2) in which R represents a hydrocarbongroup having 1 to 6 carbon atoms or a phenyl group. Among theseproducts, those particularly preferred are those in which R denotes alower alkyl radical or a phenyl radical.

Among these resins, there may be mentioned the product sold under thename Dow Corning 593 or those sold under the names Silicone Fluid SS4230 and SS 4267 by the Company General Electric and which are"dimethyl/trimethylpolysiloxane".

Organomodified silicones, in accordance with the present invention, aresilicones as defined above containing in their general structure one ora number of organofunctional groups attached directly to the siloxanechain or attached via a hydrocarbon radical.

There are mentioned, for example, silicones containing:

a) polyoxyethylene and/or polyoxypropylene groups, optionally containingalkyl groups, such as:

the product named dimethicone copolyol sold by the Company Dow Corningunder the names DC 1248 and (C12)alkylmethicone copolyol sold by theCompany Dow Corning under the name Q2 5200,

Silwet L 722, L 7500, L 77 or L 711 oils of the Company Union Carbide,

the mixture of dimethicone copolyol and of cyclomethicone such as theproduct sold under the name Q2-3225C by the Company Dow Corning.

b) perfluorinated groups such as trifluoroalkyls such as, for example,those sold by the Company General Electric under the names "FF.150Fluorosilicone Fluid" or by the Company Shin Etsu under the namesX-22-819, X-22-820, X-22-821 or X-22-822;

c) hydroxyacylamino groups such as those described in European PatentApplication EPA 0,342,834 and in particular the silicone sold by theCompany Dow Corning under the name Q2-8413;

d) thiol groups such as the silicones X 2-8360 of Dow Corning or GP 72Aand GP 71 of Genesee;

e) substituted or unsubstituted amino groups, as in GP4 Silicone Fluidof Genesee, GP 7100 of Genesee, Q2 8220 of Dow Corning, AFL 40 of UnionCarbide or the silicone called "Amodimethicone" in the CTFA dictionary;

f) carboxylate groups, such as the products described in European PatentEP 186,507 of Chisso Corporation;

g) hydroxylated groups, such as polyorganosiloxanes containinghydroxyalkyl functional groups, described in French Patent ApplicationNo. FR-85 16334, corresponding to the following formula: ##STR1## inwhich the radicals R₁, which are identical or different, are chosen frommethyl and phenyl radicals, at least 60 mol % of the radicals R₁ beingmethyl;

the radical R'₁ is a divalent C₂ -C₁₈ alkylene hydrocarbon chain;

p is between 1 and 30 inclusive;

q is between 1 and 150 inclusive;

h) alkoxylated groups as in the silicone copolymer F 755 of SWSSilicones and the products Abilwax 2428, Abilwax 2434 or Abilwax 2440 ofthe Company Goldschmidt;

i) acyloxyalkyl groups, such as, for example, thepolyorganopolysiloxanes described in French Patent Application No. 8817433, corresponding to the following formula: ##STR2## in which: R₂denotes methyl, phenyl, OCOR" or hydroxyl, a single one of the R₂ groupsper silicon atom can be OH;

R'₂ denotes methyl or phenyl, at least 60 mol % of the combined radicalsR₂ and R'₂ is [sic] methyl;

R" denotes C₈ -C₂₀ alkyl or alkenyl;

R denotes a linear or branched, divalent C₂ -C₁₈ alkylene hydrocarbon;

r is between 1 and 120 inclusive;

p is between 1 and 30;

q has the value 0 or is less than 0.5 p, p+q being between 1 and 30; thepolyorganosiloxanes of formula (II) can contain groups ##STR3## inproportions not exceeding 15% of the sum p+q+r; j) quaternary ammoniumgroups, as in the products X2 81 08 and X2 81 09 or the product Abil K3270 of the Company Goldschmidt;

k) amphoteric or betaine groups, such as in the product sold by theCompany Goldschmidt under the name Abil B 9950;

l) bisulfite groups, such as in the products sold by the CompanyGoldschmidt under the names Abil S 201 and Abil S 255.

Particularly preferred polyorganosiloxanes, according to the presentinvention, are chosen from:

1) nonvolatile silicones of linear polyalkylsiloxane type .containingtrimethylsilyl end groups, such as Silbione oils of the 70047 and 47series such as 47 V 500.000 oil marketed by Rhone-Poulenc, or ofpolyalkylarylsiloxane type such as Silbione 70641V 200 oil ofRhone-Poulenc;

2) mixtures of organosiloxanes and of cyclic silicones such as Q2 1401of the Company Dow Corning or SF 1214 Silicone Fluid of the CompanyGeneral Electric;

3) fluorosilicones of polyalkylsiloxane type containing trimethylsilylend groups and substituted on the chain by trifluoropropyl groups suchas the fluorosilicone sold by the Company Shin Et Su [sic] under thename X-22-821.

The polyorganosiloxanes used in accordance with the present inventionare present in the aqueous dispersion in a proportion of between 0.5 and50% by weight and preferably between 1 and 30% by weight with respect tothe total weight of the dispersion.

The crosslinked acrylamide/2-acrylamido-2-methyl-propanesulfonic acidcopolymer used in accordance with the present invention is moreparticularly a copolymer crosslinked with a compound containing olefinicpoly-unsaturation such as tetraallyloxyethane, allylsucrose,allylpentaerythritol or methylenebisacrylamide, partially or completelyneutralized by a neutralization agent such as sodiumhydroxide, potassiumhydroxide, aqueous ammonia or an amine such as triethanolamine ormonoethanolamine.

The copolymers of the invention can be prepared by copolymerizingacrylamide and sodium 2-acrylamido-2-methylpropanesulfonate via thefree-radical route using azobiisobutyronitrile-type [sic] initiatingagents and by precipitation in an alcohol such as tert-butanol.

The preferential copolymers are obtained by copolymerization of 70 to 55mol % of acrylamide and of 30 to 45 mol % of sodium2-acrylamido-2-methylpropanesulfonate, the crosslinking agent being usedat concentrations of 10⁻⁴ to 4.10⁻⁴ mol per mole of the mixture of themonomers.

The copolymers are present in the aqueous dispersions of the inventionat concentrations of between 0.05 and 10% by weight and preferablybetween 0.1 and 6% by weight.

A particularly preferred form of aqueous dispersion used in cosmetics orin topical application in accordance with the invention consists inusing an aqueous dispersion containing:

a) an organopolysiloxane;

b) the crosslinked acrylamide/neutralized2-acrylamido-2-methylpropanesulfonic acid copolymer;

c) a nonionic emulsifying agent;

d) one or a number of isoparaffin hydrocarbons having a high boilingpoint.

The isoparaffin hydrocarbon(s) is(are) present in proportions preferablyof between 0.02 and 6.5% by weight with respect to the total weight ofthe dispersions.

In particular, there is used a mixture of C₁₂ -C₁₃ isoparaffinhydrocarbons such as the product sold under the name Isopar M by theCompany Exxon Chemicals.

Nonionic emulsifying agents used according to the invention are chosen,for example, from sorbitan fatty acid esters, fatty acid esters,ethoxylated fatty acid esters, fatty alcohols and ethoxylated fattyalcohols, block copolymers of ethylene oxide/propylene oxide or ethyleneoxide/butylene oxide type, or their mixtures.

The emulsifying agents are preferably present in proportions of between0.01 and 1.5% by weight with respect to the total weight of thedispersions. The ether of lauryl alcohol and of polyethylene glycolcontaining 7 mol of ethylene oxide is preferably used.

A particularly preferred form of aqueous dispersion used according tothe invention contains an oil-in-water emulsion consisting of 35 to 45%by weight of crosslinked acrylamide/neutralized2-acrylamido-2-methylpropane sulfonic acid copolymer, 15 to 25% ofisoparaffin hydrocarbons, 3 to 8% by weight of the ether of laurylalcohol and of polyethylene glycol containing 7 mol of ethylene oxide,and water. Such an emulsion is marketed under the name Sepigel 305 bythe Company Seppic.

This particular aqueous dispersion, used according to the invention, ispreferably prepared by simple mixing at room temperature and withstirring of the organosiloxane polymer with the emulsion as definedabove. The mixture thus obtained can be introduced directly into thewater containing other ingredients chosen according to the desiredapplication.

The oil-in-water emulsion containing the particular copolymer of theinvention as defined above is present in the aqueous dispersion inproportions such that the copolymer concentration is between 0.05 and10% by weight and preferably 0.1 and 6% by weight of active copolymermaterial with respect to the total weight of the dispersion.

Another subject of the invention consists of a composition in the formof an aqueous dispersion intended for hair or skin treatment incosmetics and/or in dermatology, characterized in that the aqueousdispersion is as defined above.

The compositions in accordance with the present invention canadditionally contain adjuvants commonly used in cosmetics such asfragrances, dyes, preserving agents, sequestering agents, vegetable,animal or synthetic oils, sunscreening agents, anionic, nonionic,amphoteric or cationic surface-active agents, polymers, proteins,conditioning agents, foam stabilizing agents, propellants or otheradjuvants commonly used in compositions for the hair or the skin,depending on the application envisaged.

The cosmetic compositions intended for hair treatment, in accordancewith the invention, can be used in particular as a shampoo, as a rinsingproduct, to be applied before or after a shampoo, before, during orafter dyeing or bleaching, before or after a permanent wave or hairstraightening or in an intrapermanent lotion or as a non-rinsed stylingproduct, as in hair setting or blow-drying lotions.

The cosmetic compositions in accordance with the present inventionintended for skin treatment and care can be in the form of a product forthe bath or the shower, of a tanning product, of a shaving product, of ascented lotion, of a cream or of a milk for skin care or anti-suncompositions.

Preferentially, when the compositions according to the invention containdetergent surface-active agents, the latter are present in a proportionof less than 5% by weight with respect to the total weight of thecomposition.

The compositions in accordance with the present invention can be appliedin dermatology. They contain, in an effective quantity, a substancewhich is active on the dermatological level, such as, for example,vitamin A, carotenoids, proteins, natural pigments, retinoids,depigmenting agents, antiseborrheic substances, anti-acne substances,anti-inflammatory substances or anti-dandruff substances.

The cosmetic or dermatological compositions according to the presentinvention have a pH of between 3 and 10 and preferably between 5 and 7.This pH can be adjusted with basifying or acidifying agents commonlyused in cosmetics and in dermatology.

A process for the cosmetic treatment of hair according to the inventionconsists in applying the compositions as defined above to the hairdepending on the envisaged use (shampoo, rinsing treatment, stylingtreatment without rinsing), without it being necessary to observe adevelopment time, and optionally in rinsing.

A process for the cosmetic treatment of the skin according to theinvention consists in applying to the latter a composition as definedabove, depending on the envisaged use (bath, shower, tanning products,shaving products, scented lotions, care creams or milks), and optionallyin rinsing.

The examples which follow are intended to illustrate the presentinvention without having in any way a limiting nature.

EXAMPLE 1

A non-rinsed care composition is prepared:

    ______________________________________                                        oil-in-water emulsion of                                                                          0.17 g                                                    crosslinked acrylamide/sodium                                                                     as copolymer                                              2-acrylamido-2-methylpropane-                                                 sulfonate copolymer, sold by the                                              Company Seppic under the name                                                 Sepigel 305                                                                   Mixture of dimethiconol (13%),                                                                      15 g                                                    octamethylcyclotetrasiloxane and                                              decamethylcyclopentasiloxane (87%),                                           sold under the name Q2-1401 by the                                            Company Dow Corning                                                           Polydiorganosiloxane having a                                                                       5 g                                                     thiol functional group of formula:                                             ##STR4##                                                                     sold under the name X2 8360 by                                                the Company Dow Corning                                                       Preserving agent, fragrance                                                                       qs                                                        Spontaneous pH = 6.3                                                          Water               qs for 100 g                                              ______________________________________                                    

EXAMPLE 2

A non-rinsed care composition is prepared:

    ______________________________________                                        Oil-in-water emulsion of                                                                             0.14 g                                                 crosslinked acrylamide/sodium 2-                                                                     as copolymer                                           acrylamido-2-methylpropanesulfonate                                           copolymer sold by the Company Seppic                                          under the name Sepigel 305                                                    Polydimethylmethyltrifluoro-                                                                           20 g                                                 propylsiloxane, sold by the Company                                           Shin Etsu under the name X-22-821                                             Preserving agent, fragrance                                                                          qs                                                     Spontaneous pH = 7.2                                                          Water                  qs for 100 g                                           ______________________________________                                    

EXAMPLE 3

A non-rinsed care composition is prepared:

    ______________________________________                                        Oil-in-water emulsion of                                                                            0.35 g                                                  crosslinked acrylamide/sodium                                                                       as copolymer                                            2-acrylamido-2-methylpropane-                                                 sulfonate copolymer, sold by the                                              Company Seppic under the name                                                 Sepigel 305                                                                   Polydimethylsiloxane    5 g                                                   (MW 250,000), sold under the name                                             47 V 500.000 by the Company Dow                                               Corning                                                                       Preserving agent, fragrance                                                                         qs                                                      HCl qs pH = 5                                                                 Water                 qs for 100 g                                            ______________________________________                                    

EXAMPLE 4

A rinsing after-shampoo of the following composition is prepared:

    __________________________________________________________________________    Oil-in-water emulsion of                                                                           0.21 g                                                   crosslinked acrylamide/sodium 2-                                                                   as copolymer                                             acrylamido-2-methylpropanesulfonate                                           copolymer, sold by the Company Seppic                                         under the name Sepigel 305                                                    Polydiorganosiloxane of formula:                                               ##STR5##                                                                     __________________________________________________________________________     R" = mixture of C.sub.16 H.sub.33 and C.sub.18 H.sub.37 radicals              p = 7.9, q = 1.4, r = 9.3                                                

This compound contains on average 2 ##STR6## units.

It can be prepared as described in Example A of Application FR-2,641,185.

    ______________________________________                                        Preserving agent, fragrance                                                                       qs                                                        Spontaneous pH = 7.5                                                          Water               qs for 100 g                                              ______________________________________                                    

EXAMPLE 5

A rinsing after-shampoo of the following composition is prepared:

    ______________________________________                                        Oil-in-water emulsion of                                                                             0.14 g                                                 crosslinked acrylamide/sodium                                                                        as copolymer                                           2-acrylamido-2-methylpropane-                                                 sulfonate copolymer, sold by the                                              Company Seppic under the name                                                 Sepigel 305                                                                   Mixture of dimethiconol (13%),                                                                         20 g                                                 octamethylcyclotetrasiloxane and                                              decamethylcyclopentasiloxane (87%),                                           sold under the name Q2-1401 by the                                            Company Dow Corning                                                           Preserving agent, fragrance                                                                          qs                                                     Spontaneous pH = 7.6                                                          Water                  qs for 100 g                                           ______________________________________                                    

EXAMPLE 6

An after-shampoo of the following composition is prepared:

    ______________________________________                                        Oil-in-water emulsion of                                                                              1.5 g                                                 acrylamide/sodium acrylamido-2-                                                                       as copolymer                                          methylpropanesulfonate [sic] copolymer,                                       sold by the Company Seppic under                                              the name Sepigel 305                                                          Nonionic microemulsion contain-                                                                         3 g                                                 ing 30% of aminated silicone oil                                                                      as silicone                                           (amodimethicone with a viscosity                                              3.10.sup.-4 m.sup.2 /s), sold by the Company                                  Rhone-Poulenc                                                                 Preserving agent, fragrance                                                                           qs                                                    Spontaneous pH = 6.5                                                          Water                   qs for 100 g                                          ______________________________________                                    

EXAMPLE 7

An anti-sun emulsion of the following composition is prepared:

    ______________________________________                                        Oil-in-water emulsion   3.2 g                                                 of acrylamide/sodium acrylamido-                                                                      as copolymer                                          2-methylpropanesulfonate [sic]                                                copolymer, sold by the Company                                                Seppic under the name Sepigel 305                                             Mixture of dimethiconol (13%),                                                                        7.5 g                                                 octamethylcyclotetrasiloxane and                                              decamethylcyclopentasiloxane (87%),                                           sold by the Company Dow Corning                                               under the name Q2-1401                                                        Liquid paraffin           5 g                                                 Mixture of glycerol stearate and                                                                        3 g                                                 of polyethylene glycol stearate con-                                          taining 100 mol of ethylene oxide,                                            sold by the Company ICI under the                                             name Arlacel 165                                                              2-Ethylhexyl p-methoxycinnamate                                                                         6 g                                                 sold by the Company Givaudan under                                            the name Parsol MCX                                                           Preserving agent, fragrance                                                                           qs                                                    Water                   qs for 100 g                                          ______________________________________                                    

EXAMPLE 8

An after-sun product of the following composition is prepared:

    ______________________________________                                        Oil-in-water emulsion of                                                                              1.2 g                                                 acrylamide/sodium acrylamido-                                                                         as copolymer                                          2-methylpropanesulfonate [sic]                                                copolymer, sold by the Company                                                Seppic under the name Sepigel 305                                             Mixture of dimethiconol (13%),                                                                         15 g                                                 octamethylcyclotetrasiloxane and                                              decamethylcyclopentasiloxane (87%),                                           sold by the Company Dow Corning                                               under the name Q2-1401                                                        α-Bisabolol (terpene derivative)                                                                0.3 g                                                 sold by the Company Dragoco under                                             the name Dragosantol                                                          Glycerol                  5 g                                                 Mixture of glycerol stearate and                                                                        5 g                                                 of polyethylene glycol stearate                                               containing 100 mol of ethylene oxide,                                         sold by the Company ICI under the                                             name Arlacel 165                                                              Preserving agent, fragrance                                                                           qs                                                    Water                   qs for 100 g                                          ______________________________________                                    

EXAMPLE 9

An after-shampoo of the following composition is prepared:

    ______________________________________                                        Oil-in-water emulsion of                                                                              2 g                                                   acrylamide/sodium acrylamido-                                                                         as copolymer                                          2-methylpropanesulfonate [sic]                                                copolymer, sold by the Company                                                Seppic under the name Sepigel 305                                             Mixture of dimethiconol (13%),                                                                        5 g                                                   octamethylcyclotetrasiloxane and                                              decamethylcyclopentasiloxane (87%),                                           sold by the Company Dow Corning                                               under the name Q2-1401                                                        Polymer of hydroxyethyl cellul-                                                                       1 g                                                   ose and of epichlorohydrin quater-                                            nized with trimethylamine, sold by                                            the Company Union Carbide under                                               the name JR 400                                                               Preserving agent, fragrance                                                                           qs                                                    Triethanolamine qs pH = 6.5                                                   Water                   qs for 100 g                                          ______________________________________                                    

EXAMPLE 10

A rinsing after-shampoo composition is prepared:

    ______________________________________                                        Oil-in-water emulsion of                                                                              10 g                                                  acrylamide/sodium acrylamido-2-                                                                       as copolymer                                          methylpropanesulfonate [sic]                                                  copolymer, sold by the Company                                                Seppic under the name Sepigel 305                                             Mixture of two polydimethyl-                                                                          4.5 g                                                 siloxanes having different                                                    viscosities, sold by the Company                                              General Electric under the name                                               CF 1241                                                                       Preserving agent        qs                                                    Spontaneous pH = 5.5                                                          Water                   qs for 100 g                                          ______________________________________                                    

EXAMPLE 11

A rinsing after-shampoo composition is prepared:

    ______________________________________                                        Oil-in-water emulsion of                                                                              5 g                                                   acrylamide/sodium acrylamido-                                                                         as copolymer                                          2-methylpropanesulfonate [sic]                                                copolymer, sold by the Company                                                Seppic under the name Sepigel 305                                             Polydimethylsiloxane    3 g                                                   (MW 250,000) sold by the Company Dow                                          Corning under the name 70047 V 500.000                                        Preserving agent        qs                                                    Triethanolamine qs pH = 7.2                                                   Water                   qs for 100 g                                          ______________________________________                                    

We claim:
 1. An aqueous dispersion for use in cosmetics or in topicalapplication comprising, in a cosmetically or physiologically acceptableaqueous medium, at least one organopolysiloxane and one crosslinkedacrylamide neutralized 2-acrylamido-2 -methylpropanesulfonic acidcopolymer, the organopolysiloxane is selected from the group consistingof(i) cyclic silicons containing 3 to 7 silicon atoms or cyclocopolymersof dimethylsiloxane/methylalkylsiloxane type; (ii) linear siliconshaving 2 to 9 silicon atoms and having a viscosity less than or equal to5.10¹⁻⁶ m² /s at 25° C.; (iii) polyalkylsiloxane; (iv) polyarylsiloxane;(v) polyalkylarylsiloxane; (vi) silicon gums; (vii) silicon resins;(viii) organomodified polysiloxanes and their mixtures,theorganopolysiloxane is present in proportions of between 0.5 and 50% byweight with respect to the total weight of the dispersion and thecopolymer is present in proportions of between 0.05 and 10% by weightwith respect to the total weight of the dispersion, with the provisothat the organopolysiloxane is not chosen from linearpolydimethylsiloxanes with a viscosity of less than 10⁻¹ m² /s, thecopolymer is obtained by copolymerization of 70 to 55 mol % ofacrylamide and 30 to 45 mol % of sodium 2-acrylamido2-methylpropanesulfonate in the presence of 10⁻⁴ to 4.10⁻⁴ mol ofcrosslinking agents per mol of mixture of the two monomers.
 2. Theaqueous dispersion according to claim 1, wherein the organopolysiloxaneis selected from the group consisting of:A) poly(C₁ -C₂₀)alkylsiloxanes,linear polydimethylsiloxanes containing trimethylsilyl end groups andlinear polydimethylsiloxanes containing trihydroxysilyl end groups, witha viscosity greater than 10⁻¹ m² /s; B) linear and/or branchedpolydimethyldiphenylsiloxanes and polydimethylphenylsiloxanes, with aviscosity 10⁻⁵ to 5.10⁻² m² /s at 25° C.; C) gums with a molecular massof between 200,000 and 1,000,000, used alone or in the form of a mixturein a solvent, selected from the group consisting of the followingcopolymers:poly[dimethylsiloxane/methylvinylsiloxane],poly[dimethylsiloxane/diphenylsiloxane],poly[dimethylsiloxane/phenylmethylsiloxane], andpoly[dimethylsiloxane/diphenylsiloxane/methylvinylsiloxane]and thefollowing mixtures: mixtures formed from a polydimethylsiloxanehydroxylated at the chain ends and from a cyclic polydimethylsiloxane,mixtures formed from a polydimethylsiloxane gum and from a cyclicsilicone, and mixtures of two polydimethylsiloxanes having differentviscosities; D) organopolysiloxane resins containing R₂ SiO_(2/2),RSiO_(3/2) and SiO_(4/2) units in which R represents a hydrocarbon grouphaving 1 to 6 carbon atoms or a phenyl group.
 3. The aqueous dispersionaccording to claim 1 wherein the organopolysiloxane contains in itsgeneral structure one or a number of organofunctional group(s) attacheddirectly to the siloxane chain or attached via a hydrocarbon radical,and in that it is selected from the group consisting ofpolyorganosiloxanes containing:a) polyoxyethylene and/orpolyoxypropylene groups, b) perfluorinated groups, c) hydroxyacylaminogroups, d) thiol groups, e) substituted and unsubstituted amino groups,f) carboxylate groups, g) hydroxyalkyl groups of formula: ##STR7## inwhich the radicals R₁, which are identical or different, are selectedfrom the group consisting of methyl and phenyl radicals, at least 60mol% of the radicals R₁ being methyl,the radical R'₁ is a divalent C₂-C₁₈ alkylene hydrocarbon chain, p is between 1 and 30 inclusive; q isbetween 1 and 150 inclusive; h) alkoxylated groups, i) acyloxyalkylgroups corresponding to the following formula: ##STR8## in which: R₂denotes methyl, phenyl, OCOR" or hydroxyl, a single one of the R₂ groupsper silicon atom being OH,R'₂ denotes methyl or phenyl, at least 60 mol% of the combined radicals R₂ and R'₂ are methyl, R" denotes C₈ -C₂₀alkyl or alkenyl, R denotes a linear or branched, divalent C₂ -C₁₈alkylene hydrocarbon, r is between 1 and 120, inclusive, p is between 1and 30, q has the value 0 or is less than 0.5 p, p+q being between 1 and30,the polyorganosiloxanes of formula (II) containing ##STR9## groups inproportions not exceeding 15% of the sum p+q+r, j) quaternary ammoniumgroups, k) amphoteric or betaine groups, and l) bisulfite groups.
 4. Theaqueous dispersion according to claim 1, wherein the organopolysiloxaneis selected from the group consisting of:1) nonvolatile silicones oflinear polyalkylsiloxane type containing trimethylsilyl end groups or ofpolyalkylphenylsiloxane type, 2) mixtures of organosiloxanes and ofcyclic silicones, 3) fluorosilicones of polyalkylsiloxane typecontaining trimethylsilyl end groups and substituted on the chain bytrifluoropropyl groups.
 5. The aqueous dispersion according to claim 1wherein the acrylamide/2-acrylamido-2-methylpropanesulfonic acidcopolymer is crosslinked with a crosslinking agent containing olefinicpolyunsaturation selected from the group consisting oftetraallyloxyethane, allylsucrose, allylpentaerythritol andmethylenebisacrylamide and in that it is partially or completelyneutralized by sodium hydroxide, potassium hydroxide, aqueous ammonia oran amine.
 6. The aqueous dispersion according to claim 1 wherein theaqueous dispersion comprises:a) the organopolysiloxane, b) thecrosslinked acrylamide/neutralized 2-acrylamido-2-methylpropanesulfonicacid copolymer, c) a nonionic emulsifying agent, d) an isoparaffinhydrocarbon or a mixture of isoparaffin hydrocarbons having a highboiling point.
 7. The aqueous dispersion according to claim 6, whereinthe emulsifying agent is selected from the group consisting of sorbitanfatty acid esters, ethoxylated and non-ethoxylated fatty acid esters,ethoxylated and non-ethoxylated fatty alcohols, and block copolymers ofethylene oxide/propylene oxide and ethylene oxide/butylene oxide type,and their mixtures.
 8. The aqueous dispersion according to claim 6,wherein the emulsifying agent is present in proportions of between 0.01and 1.5% by weight and in that the isoparaffin hydrocarbon(s) arepresent in proportions of between 0.02 and 6.5% by weight with respectto the total weight of the dispersion.
 9. The aqueous dispersionaccording to claim 6 wherein the nonionic emulsifying agent is the etherof lauryl alcohol and of polyethylene glycol containing 7 mol ofethylene oxide and in that a mixture of C₁₂ -C₁₃ isoparaffinhydrocarbons is used.
 10. The aqueous dispersion according to claim 1,wherein the crosslinked acrylamide/neutralized2-acrylamido-2-methylpropanesulfonic acid copolymer is dispersed at aconcentration of 35 to 45% by weight in an oil-in-water emulsioncontaining 15 to 25% by weight of a mixture of C₁₂ -C₁₃ isoparaffinhydrocarbons, 3 to 8% by weight of ether of lauryl alcohol and ofpolyethylene glycol containing 7 mol of ethylene oxide, and water. 11.The aqueous dispersion according to claim 10, wherein the oil-in-wateremulsion containing the crosslinked acrylamide/neutralized2-acrylamido-2-methylpropanesulfonic acid copolymer is present in theaqueous dispersion in proportions such that the copolymer concentrationis between 0.05 and 10% by weight of active material with respect to thetotal weight of the dispersion.
 12. Cosmetic composition in the form ofan aqueous dispersion intended for hair or skin treatment, wherein theaqueous dispersion is as defined in claim
 1. 13. Composition accordingto claim 12, further comprising adjuvants commonly used in cosmetics,chosen from fragrances, dyes, preserving agents, vegetable, animal orsynthetic oils, proteins, conditioning agents, anionic, nonionic,amphoteric or cationic surface-active agents, sequestering agents, foamstabilizing agents, polymers, sunscreening agents, propellants orsubstances active on the cosmetic level.
 14. Composition according toeither of claims 12 or 13, wherein it has a pH of between 3 and
 10. 15.Composition according to claim 12 intended for hair treatment, whereinit is provided in the form of a shampoo, of a rinsing product, to beapplied before or after a shampoo, before, during or after dyeing orbleaching, before or after a permanent wave or hair straightening, in anintrapermanent lotion or as non-rinsed styling products.
 16. Compositionaccording to claim 12, intended for skin treatment, wherein it isprovided as a bath or shower product, tanning product, anti-suncomposition, shaving product, care cream or milk or scented lotion. 17.Process for cosmetic hair treatment, wherein at least one composition asdefined in claim 15 is applied to the hair.
 18. Process for cosmeticskin treatment, wherein a composition as defined in claim 16 is appliedto the skin.
 19. Dermatological composition in the form of an aqueousdispersion, wherein the aqueous dispersion is as defined in claim 1 andin that it contains, in an effective quantity, at least one substancewhich is active on the dermatological level.
 20. The aqueous dispersionof claim 1 wherein the cyclic silicones contain 4 to 5 silicon atoms.21. Composition according to claim 12, wherein it has a pH of between 5and 7.